基于RFID技术的混凝土搅拌站车辆管理系统

混凝土搅拌站运输车大流量运输作业过程中,传统的人工管理计数、统计、调度、监控等环节的工作十分繁琐,且效率低下。针对人工管理模式的缺陷进行信息化管理模式的改进,将RFID(无线射频识别)技术与计算机软件技术相结合,对进出搅拌站的运输车辆实行无人值守的管理,克服了传统方法的弊端。设备安全耐用,使用方便,系统灵敏可靠,提高了工作效率和经济效益,具有很强的实用性。     

一种摆式列车未平衡加速度测量仪的研究

介绍了一在于单摆的高精度数字测量仪，采用磁电涡流阻尼和光电编码器摆角的结构，它适合于测量车体的理论与实际倾斜角的误差，从而测量对应的未平衡加速度。对测量原理进行了分析，同时介绍了实验室条件下试验的结果。     

基于插件技术实现遥测数据事后处理系统软件

针对不同型号导弹遥测数据事后处理方法存在差异,系统软件需要不断进行调整的问题,引入插件技术,将各类数据处理方法通过动态链接库设计成插件,方便软件的修改和功能扩充,满足遥测数据事后处理软件多样化特点,提高系统软件二次开发效率.     

隧道反射地震法超前探测研究

隧道施工地质超前预报是在地下工程施工过程中,采用一些方法或手段预测掌子面前方一定范围内存在的不良地质体或地质界面的位置、性质和规模,为安全、快捷、持续施工采取防范措施提供可靠的依据。本文在详述隧道反射地震法超前探测原理的基础上,分析地下全空间情况下,震源与接收点之间的地震波场运动关系,讨论观测系统的优化设计方案,较全面地总结隧道反射地震法超前预报时距曲线规律。同时开发一套隧道反射地震法超前探测数据处理系统(TRSP1.0),该系统涵盖波形处理、正演模拟、成像处理和岩石动力学参数提取等功能模块,给出合理的处理流程。通过理论模型和实际数据测试验证,取得较理想的效果。     

Identification of potential sites for deep-ocean waste isolation with a geographic site-selection model

Identification of optimal sites for the isolation of waste on the abyssal seafloor was performed with two approaches: by the traditional method of map overlays of relevant attributes, and by a specially developed, automated Site-Selection Model (SSM). Five initial, Surrogate Sites, identified with the map-overlay approach, were then compared with the more rigorously produced scores from the SSM. The SSM, a process for optimization of site locations, accepts subjective, expert-based judgments and transforms them into a quantitative, reproducible, and documented product. The SSM is adaptable to any siting scenario. Forty-one factors relevant to the isolation scenario, including 21 weightable factors having a total of 123 scorable categories, have been entered into the SSM. Factors are grouped under project definition, unique environments, anthropogenic, geologic, biologic, weather, oceanographic and distance criteria. The factor scores are linked to a georeferenced database array of all factors, corresponding to 1°×1° latitude–longitude squares. The SSM includes a total of 2241 one-degree squares within 1000 n.m. of the U.S. coasts, including the western North Atlantic, the Gulf of Mexico, and the eastern North Pacific. Under a carefully weighted and scored scenario of isolation, the most favorable sites identified with the SSM are on the Hatteras and Nares Abyssal Plains in the Atlantic. High-scoring sites are also located in the Pacific abyssal hills province between the Murray and Molokai Fracture Zones. Acceptable 1° squares in the Gulf of Mexico are few and of lower quality, with the optimum location on the northern Sigsbee Abyssal Plain. Two of the five Surrogate Site locations, on the Hatteras and Sigsbee Abyssal Plains, correspond to the best SSM sites in each ocean area. Two Pacific and a second Atlantic Surrogate Site are located in low-scoring regions or excluded by the SSM. Site-selection results from the SSM, although robust, are an initial attempt to quantify the site-selection process. The SSM database exposes a significant lack of high-quality information for many areally mappable attributes on the abyssal seafloor, particularly bottom-current speed and measures of biologic productivity and flux. Terminologies and classifications of some measures, such as sediment types, suffer from parochialism and vary by ocean. Considerable research is needed even for a broad understanding of the environmental measures required to make sound societal decisions about use of the abyssal seafloor for disposal or other purposes.     

基于数字信号处理的直接转矩控制研究

直接转矩控制因控制简单、具有优良的动静态特性，在电机控制中应用越来越广泛。但它在低速区的局限也较多。随着数字信号处（Digital Signal Processing，缩写DSP）技术的发展，使得改善其低速控制特性成为可能。文中简介了直棼转矩控制技术的特点、控制原理及难点，探讨了一种应用DSP技术的直接转矩控制方法。     

船舶主机数字调速仿真训练器的研制

为了研究船舶主机调速系统的特性和控制算法,将船舶主机调速系统的性能要求转化为复合PID控制算法的问题,研制基于Nabtesco MG-800Ⅲ的数字调速仿真器。非线性PID实现主机转速控制,其比例增益、微分增益和积分增益分别是控制偏差的非线性函数。模糊自整定PID实现主机油门的位置控制,其PID的3个参数随着偏差和偏差变化速度,根据模糊控制原理进行在线修改。物理仿真结果表明,数字调速器的非线性模糊自适应PID算法能提高调速系统的动态精度和抑制扰动的能力。     

海事信息安全关键技术研究

因全国海事系统的计算机都通过网络联系到一起,信息安全的内涵也就发生了根本的变化。它不仅从一般性的防卫变成了一种非常普通的防范,而且还从一种专门的领域变成了无处不在。当步入21世纪这一信息社会、网络社会的时候,建立起一套完整的海事信息安全体系也成为当务之急。     

"肋骨冷弯加工机器人"的研制

从弦线测量法控制原理、大地式检测装置、"肋骨冷弯加工机器人"信息集成系统、加工数据预处理、智能控制方法、自动冲印号料装置诸方面,较为详尽地介绍了最近研制成功的、国际首创的"肋骨冷弯加工机器人"。该"肋骨冷弯加工机器人"业已成功地应用于造船生产。     

Fast direction of arrival algorithm based on vector-sensor arrays using wideband sources

An acoustic vector sensor （AVS） can capture more information than a conventional acoustic pressure sensor （APS）. As a result, more output channels are required when multiple AVS are formed into arrays, making processing the data stream computationally intense. This paper proposes a new algorithm based on the propagator method for wideband coherent sources that eliminates eigen-decomposition in order to reduce the computational burden. Data from simulations and lake trials showed that the new algorithm is valid： it resolves coherent sources, breaks left/right ambiguity, and allows inter element spacing to exceed a half-wavelength.